Question

plz answer 6, 9, 10 sums
explain
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Answer 1

Answer:

6 .

Sum of there expenditure = 16 + 17 + 21 = 54

So mean = 54 / 3 = 18

If expenditure is triple = 54 × 3 =162

mean wil

= 162 / 3 = 54

If hotel manager give 50℅ discount or there spend is 54 - 54 × 50/100 = 27

So average = 27/3 = 9

Relationship : If expenditure is change by k times mean will also change by k times.

7.

First 10 natural number sum

$= 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 \\ = 55$

So average = 55 / 10 = 5.5

8.

Sum of First 5 prime numbers

= 2 + 3 + 5 + 7 + 11

= 28

So average = 28 / 5 = 5.6

Answer 2

Answer:

9. AMOUNT SPENT BY 3 FRIENDS= 16 , 17 , 21

AVG EXPENDITURE= 16 +17+21÷ 3

=54÷3 = 18

AMT SPENT 3 TIMES MORE = 16×3 ,17×3, 21×3 = 48,51,63

AVG = 48 + 51 + 63 ÷3 =162÷3 =54

50% DISCOUNT =16÷2 ,17÷2 ,21÷2

=8,8.5,10.5

AVG =8+8.5+10.5÷3 = 27÷3 =9

THECHANGE IN OBSERVATION IS ALSO CARRIED OUT IN MEAN

10. FIND THE MEAN OF FIRST 10 EVEN NUMBERS

FIND THE MEAN OF FIRST TEN ODD NUMBERS